Panorama visits Blackburn in Lancashire to investigate how increased separation and segregation between Muslim Asians and whites is dividing communities.

Blackburn presents a stark example of a difficult, national problem.

For all the hopeful talk about "integration", "multiculturalism" and now "cohesion", the reality on the ground appears to be that Britain's Muslim Asian community and its white community have few points of contact, and that the white majority often feel they share little in common with the growing Muslim Asian minority.

Of course there are hopeful exceptions, but Blackburn - where Muslim Asians on the last census made up 24% of the population and whose local council takes the issue very seriously - demonstrates clearly what the problem is.